Does this look good? I will admit I have no idea what to look for in an RODI system. I like this one because of its convience, I dont have anywhere to really keep it hooked up and the garden house feature seems like it will work real well for me. Also I was kinda wondering how often I have to change out the different membranes and will the ones I need for this system be easy to find ? Are any of the upgrades they have listed worth adding on? Is it set at a good price or could i do better?